天线阵

With the overview of present MIMO antenna research, the thesis brings forward a new kind of polar diversity antenna array applied in MIMO base stations, which elements are planar printed dipoles. The beamforming technology is used to obtain a particular type of elevation pattern, which has square cosecant characteristic.

本文在对目前MIMO 天线领域的研究动态进行概述的基础上，结合基站的自身特点，提出并实现了一种新型的基站极化分集波束赋形天线阵列，其阵元为平面印刷偶极子，阵列在俯仰面形成类似平方余割形式的方向图分布。

In this article, the radiating surface and power divider are researched in this paper.

本文就裂缝阵列天线的辐射阵面及功分系统设计技术进行研究。

A microsrip quasi-traveling wave fuze antenna is designed,working in millimeter-wave used for missile body fore-end which utilizing the loss characteristic of microstrip line,eliminates the reflected wave without the matched load in the design.

设计了一种用于弹体前端的毫米波微带准行波引信天线，此线阵利用微带线自身的损耗特性消除反射波从而省去了匹配负载。

The sidelobe has many ripples in condition of small training sample size and the diagonal loading technology is applied to this method, which improve the convergence speed of sidelobe. We also study the pattern control of area array. The effectiveness of this new method is illustrated by the designed simulations.5. Adaptive sidelobe cancellation is a important part of phase array radar. To realize low sidelobe and suppressing the interferer the antenna technique and signal process are combined.

用对角加载方法解决了小快拍数下收敛速度慢的问题，并仿真给出了加载量的选取范围，对面阵的自适应方向图控制文中也进行了详细讨论，阵列幅相误差和互耦误差对自适应方向图控制影响，文中也给出了仿真和分析。5、自适应旁瓣相消是相控阵雷达技术的一个重要组成部分，它将天线技术与信号处理技术结合在一起，使相控阵天线实现超低副瓣，达到抗有源干扰的目的。

In this paper, broadband and dual-polarized planar microstrip array antennas in Ku band are studied.

本文的主要工作是Ku波段的宽带双极化微带平面阵天线的研究。

A physical - optics method for computing the far field of a parabolic cylinder fed by a linear rectangular patch antenna phased - array is presented.

用物理光学法对一副微带相控线阵馈电的抛物柱天线的远场方向图进行了仿真计算。

The radiation performance at lower frequencies can be improved using the stacked TEM-horn configuration and decreased using rain gutter and square plane TEM-horn configuration.

当TEM喇叭天线阵列单元沿E面叠状排列，阵元间互耦可以改善阵列的低频辐射；沿H面排列的槽状线阵或平面方阵不利于阵列的低频辐射的改善。

To meet the challenge of future mobile communication and integrated communication and radiolocation systems, a new quaternary 8 phases space-time modulation technique with 36-element circular array antenna is proposed.

针对通信定位综合一体化的趋势和未来移动通信发展的需要，本文提出了一种新颖的四进制八相时空调制技术，设计了一种利用36元均匀间隔圆阵天线发射的通信定位综合化系统。

At 915MHz band, Yagi antenna, helical antenna, microstrip antenna array are designed, and the results of simulation and measurement are presented.

设计了工作在915MHz频段八木天线、螺旋天线、微带阵天线，并给出了仿真与测试结果。

A method of calibrating the sensors' position error, channel gain and phase uncertainties of equispaced linear array without phase delay ambiguity was presented.

针对等距线性阵列天线的阵元位置误差和通道幅度相位不一致性问题，提出了一种采用单校正源分时多方位的无相位延迟模糊校正方法。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。